Amphibolips trizonata Ashmead.

The gall of this species was said to be "in the blossoms of an oak," but no description was given and the host oak unknown.

Host.--Quercus emoryi and Quercus hypoleuca

Gall.--Globular, 25-40 mm in diameter; green, turning to a tan later; smooth or with a finely coriaceous surface. Interior of a dense cellular structure lighter in color than surface, but darker toward the nonseparable larval cell in center. From the attachment a number of whitish strands run up through the cellular tissue to the larval cell. Atached singly to side of small twigs, not a flower gall.

Habitat.--AZ, NM

Amphibolips trizonata Ashm.

Quercus emoryi, hypoleuca [hypoleucoides]
Stem galls
detachable
Fig 119.

Amphibolips trizonata, new species.

Gall.--A large, globular gall, from an inch to an inch and a quarter in diameter, externally resembling A coccineae, Osten Sacken, but internally of a white, pithy, cellular structure.

Five specimens, reared during June, 1882, from galls received May 2, 1882, collected in AZ. The gall is said to grow on the blossoms of an oak.

Amphibolips trizonata Ashm.

Galls of the aments or catkins
Globose, moderately thick-shelled, yellowish, almost smooth, pithy gall, diameter 20 to 33 mm, possibly on oak blossoms.

Amphibolips trizonata
Ball-gall wasp

Hosts: Quercus emoryi, hypoleucoides

The large, golf-ball size, monothalamous bisexual-generation bud galls of this wasp will certainly grab your attention.

Amphibolips trizonata

Gall. On the young twigs of a species of oak in June. Almost or entirely globular with a moderately thick outer shell. Yellowish and almost smooth. Internally it is completely filled with a soft, pithy substance like Amphibolips palmeri. Centrally there is a larval cell which is fastened to the surrounding mass. Diameter 20 to 35 mm.

According to WH Ashmead, the gall is said to grow on the blossoms of an oak.

Habitat: AZ